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authorJan Kiszka <jan.kiszka@siemens.com>2011-02-07 12:19:18 +0100
committerMarcelo Tosatti <mtosatti@redhat.com>2011-02-14 12:39:46 -0200
commit6792a57bf19ab37f61f5acf0f8e3003cf08814af (patch)
treefc81419978ca867d9db8557d13508d971b634402 /kvm-all.c
parent83f338f73ecb88cc6f85d6e7b81ebef112ce07be (diff)
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kvm: Separate TCG from KVM cpu execution
Mixing up TCG bits with KVM already led to problems around eflags emulation on x86. Moreover, quite some code that TCG requires on cpu enty/exit is useless for KVM. So dispatch between tcg_cpu_exec and kvm_cpu_exec as early as possible. The core logic of cpu_halted from cpu_exec is added to kvm_arch_process_irqchip_events. Moving away from cpu_exec makes exception_index meaningless for KVM, we can simply pass the exit reason directly (only "EXCP_DEBUG vs. rest" is relevant). Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Diffstat (limited to 'kvm-all.c')
-rw-r--r--kvm-all.c19
1 files changed, 9 insertions, 10 deletions
diff --git a/kvm-all.c b/kvm-all.c
index 19cf188..802c6b8 100644
--- a/kvm-all.c
+++ b/kvm-all.c
@@ -895,10 +895,11 @@ int kvm_cpu_exec(CPUState *env)
if (kvm_arch_process_irqchip_events(env)) {
env->exit_request = 0;
- env->exception_index = EXCP_HLT;
- return 0;
+ return EXCP_HLT;
}
+ cpu_single_env = env;
+
do {
if (env->kvm_vcpu_dirty) {
kvm_arch_put_registers(env, KVM_PUT_RUNTIME_STATE);
@@ -927,7 +928,6 @@ int kvm_cpu_exec(CPUState *env)
kvm_flush_coalesced_mmio_buffer();
if (ret == -EINTR || ret == -EAGAIN) {
- cpu_exit(env);
DPRINTF("io window exit\n");
ret = 0;
break;
@@ -978,8 +978,8 @@ int kvm_cpu_exec(CPUState *env)
DPRINTF("kvm_exit_debug\n");
#ifdef KVM_CAP_SET_GUEST_DEBUG
if (kvm_arch_debug(&run->debug.arch)) {
- env->exception_index = EXCP_DEBUG;
- return 0;
+ ret = EXCP_DEBUG;
+ goto out;
}
/* re-enter, this exception was guest-internal */
ret = 1;
@@ -995,13 +995,12 @@ int kvm_cpu_exec(CPUState *env)
if (ret < 0) {
cpu_dump_state(env, stderr, fprintf, CPU_DUMP_CODE);
vm_stop(VMSTOP_PANIC);
- env->exit_request = 1;
- }
- if (env->exit_request) {
- env->exit_request = 0;
- env->exception_index = EXCP_INTERRUPT;
}
+ ret = EXCP_INTERRUPT;
+out:
+ env->exit_request = 0;
+ cpu_single_env = NULL;
return ret;
}